I just have to say the entire "production" at the end of the show was definitely planned. There wasn't enough time left in the show for Casey to sing, the judges to deliberate and then give their decision. They usually go to commercial while the judges discuss it. PLUS, earlier in the show Ryan made a comment about making sure you stay tuned to the very end of the show. Why would he say that???
Regardless if it was planned or not, I'm glad they kept him and I'm glad there will be 11 going on tour. Not that I'll go see them, probably. But you never know. I went the year Taylor Hicks won (mainly just to see Chris Daughtry).